[Python] Python dependency injection vs composition?

I'm learning python and just wanted to confront two versions of the same code and ask which approach is better. Basically I have the Reputation class which should be bound to each Warrior object. My intuition tells me it would be the easiest to simply create Reputation instance during initialazing Warrior object. On the other hand it's against dependency injection. I would appreciate any feedback.

class Reputation:
def __init__(self, reputation):
self._reputation = reputation

def rank(self):
if self._reputation >= 10: return "basic"
if self._reputation >= 20: return "mid"
if self._reputation >= 30: return "advanced"

def set(self, value):
if value < 0:
raise ValueError("Negative")
self._reputation = value

def get(self):
return self._reputation


composition

class Warrior:
def __init__(self, name: str, reputation: int = 0):
self.name = name
self._reputation = Reputation(reputation)

@property
def rank(self):
return self._reputation.rank()

@property
def reputation(self):
return self._reputation.get()

@reputation.setter
def reputation(self, value):
self._reputation.set(value)

def main():
warrior = Warrior("muah")
warrior.reputation += 10
print(warrior.rank)
-- basic


Or dependency injection:

class Warrior:
def __init__(self, name: str, reputation: Reputation):
self.name = name
self._reputation = reputation

@property
def rank(self):
return self._reputation.rank()

@property
def reputation(self):
return self._reputation.get()

@reputation.setter
def reputation(self, value):
self._reputation.set(value)

def main():
warrior_reputation = Reputation(reputation=11)
warrior = Warrior("muah", reputation=warrior_reputation)
warrior.reputation += 10
print(warrior.rank)
-- mid

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